Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ea7a7b57c2d1f…

MALICIOUS

PDF

93.8 KB Created: 2021-05-28 16:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d03a99fee1038fe9d3b5207276b89fd SHA-1: eb3033d06f4f99f866325013e77a22b551389f54 SHA-256: 010ea7a7b57c2d1fdbaf6e64093d01405022443c8ab76faed9fb9b64a7bdda43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded links and the heuristic indicating a link farm strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=futuristic+songs+free+download+sites
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/pidudilubojinososuw.pdf
    • https://dasifapuzo.weebly.com/uploads/1/3/1/4/131454731/8612975.pdf
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/bowogujakus_vuwoviwajipanow.pdf
    • https://cdn-cms.f-static.net/uploads/4450046/normal_5fd15c8e6f14d.pdf
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5fd63334db7da.pdf
    • https://pudixibavumop.weebly.com/uploads/1/3/5/9/135964902/rifajemak-faliwiguguladik-vitazizilan.pdf
    • https://kuxivudu.weebly.com/uploads/1/3/0/8/130813582/pidobimegutofu.pdf
    • https://cdn-cms.f-static.net/uploads/4462093/normal_6068f97471192.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_60556b331a094.pdf
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6038d590e99bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d0fb991c-de20-4257-8285-1986d2e876ca/40862781360.pdf
    • https://uploads.strikinglycdn.com/files/a69dabf1-da16-45b2-b763-3ac0c7b9d1d3/ray_bradbury_biografia_breve.pdf
    • https://uploads.strikinglycdn.com/files/dfde9b77-5bb4-4975-b7b7-0d636d035190/teloxikinobuketoxava.pdf
    • https://uploads.strikinglycdn.com/files/bbcc47f2-6038-420d-811e-fc6c2103fa7e/62239959562.pdf
    • https://uploads.strikinglycdn.com/files/88465327-1e11-4e27-aa87-16d8224ee902/carl_sagan_death_cause.pdf
    • https://uploads.strikinglycdn.com/files/b37bcb4a-e0d8-46ce-9eaf-e0bb3fb47a20/petasefajedezotidirera.pdf
    • https://uploads.strikinglycdn.com/files/13629c0b-9393-4d00-b2c3-cf4f299693e0/coronilla_a_san_miguel_arcngel.pdf
    • https://uploads.strikinglycdn.com/files/64f530f2-822a-4fcc-8cce-0cfa33f9b19d/the_son_of_neptune_ebook.pdf
    • https://uploads.strikinglycdn.com/files/09581396-a8d8-4cdc-af8a-03c137053619/98582147436.pdf
    • https://uploads.strikinglycdn.com/files/a844cb90-5fb3-4a30-bb91-bb0c11dae654/65745530363.pdf
    • https://uploads.strikinglycdn.com/files/dc8bd7b6-be2c-48e5-a7d8-dd502ace18fc/should_a_single_man_buy_a_house_reddit.pdf
    • https://uploads.strikinglycdn.com/files/5c156a40-44be-421a-88eb-6553f8910f04/49572649130.pdf
    • https://uploads.strikinglycdn.com/files/3204381c-615f-4aa7-a41a-f2ed4526b038/doguwezeremedibiluv.pdf
    • https://uploads.strikinglycdn.com/files/c0116706-ae4c-4949-8b76-0ce2e9c50d2c/how_to_fix_zmodo_camera_offline.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012616.bin
24e617877d3f2879041f4bd372bd3ed94b6c087e0a307918cb1175f468c67f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12616 5120 bytes
font_01_sfnt_off0001379b.bin
3e7c172882c1dfe2f44cab732648c6b3e830ad6eede2b1072f8cf414bc45d400
pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 10656 bytes
font_02_sfnt_off00015b5f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5F 4324 bytes